Kumori Hayashi was born half evil. She can't control when her dark side reveals itself. She kills every night. She can't stop it but she sees everything from behind the eyes of the evil demon slowly taking over her body. She was shunned by her family and has no friends. She has no where to go. She tries to flee but the demon just goes right back towards the innocent people who will have their lives taken. She's tried many times to end her life along with the demons but when she tries, the demon stops her. She's forced to live her whole life with a demon controlling half of her. As time goes by, the demon grows stronger. When Kumori meets a boy named Katsuo Tanaka, she feels something she never has before. Love. Can this love destroy the demon within her?